Connections between the pulvinar complex and cytochrome oxidase-defined compartments in visual area V2 of macaque monkey

1995 ◽  
Vol 104 (3) ◽  
Author(s):  
JonathanB. Levitt ◽  
Takashi Yoshioka ◽  
JenniferS. Lund
Keyword(s):  
Cytochrome Oxidase ◽  
Macaque Monkey ◽  
Visual Area ◽  
Area V2

Projections from the cytochrome oxidase modules of visual area V2 to the ventral posterior area in the macaque

2004 ◽  
Vol 155 (1) ◽  
pp. 102-110 ◽  
Author(s):  
Hiroyuki Nakamura ◽  
Wu Ri Le ◽  
Masumi Wakita ◽  
Akichika Mikami ◽  
Kazuo Itoh
Keyword(s):  
Cytochrome Oxidase ◽  
Visual Area ◽  
Area V2 ◽  
Posterior Area

Organization of callosal linkages in visual area V2 of macaque monkey

2000 ◽  
Vol 428 (2) ◽  
pp. 278-293 ◽  
Author(s):  
Paul L. Abel ◽  
Brendan J. O'Brien ◽  
Jaime F. Olavarria
Keyword(s):  
Macaque Monkey ◽  
Visual Area ◽  
Area V2

Processing of Kinetically Defined Boundaries in Areas V1 and V2 of the Macaque Monkey

2000 ◽  
Vol 84 (6) ◽  
pp. 2786-2798 ◽  
Author(s):  
V. L. Marcar ◽  
S. E. Raiguel ◽  
D. Xiao ◽  
G. A. Orban
Keyword(s):  
Luminance Contrast ◽  
Macaque Monkey ◽  
Visual Area ◽  
Local Motion ◽  
Response Latencies ◽  
Area V2 ◽  
Response Onset ◽  
Kinetic Boundary ◽  
Student’S T ◽  
Statistical Criteria

We recorded responses in 107 cells in the primary visual area V1 and 113 cells in the extrastriate visual area V2 while presenting a kinetically defined edge or a luminance contrast edge. Cells meeting statistical criteria for responsiveness and orientation selectivity were classified as selective for the orientation of the kinetic edge if the preferred orientation for a kinetic boundary stimulus remained essentially the same even when the directions of the two motion components defining that boundary were changed by 90°. In area V2, 13 of the 113 cells met all three requirements, whereas in V1, only 4 cells met the criteria of 107 that were tested, and even these demonstrated relatively weak selectivity. Correlation analysis showed that V1 and V2 populations differed greatly ( P < 1.0 × 10−6, Student's t-test) in their selectively for specific orientations of kinetic edge stimuli. Neurons in V2 that were selective for the orientation of a kinetic boundary were further distinguished from their counterparts in V1 in displaying a strong, sharply tuned response to a luminance edge of the same orientation. We concluded that selectivity for the orientation of kinetically defined boundaries first emerges in area V2 rather than in primary visual cortex. An analysis of response onset latencies in V2 revealed that cells selective for the orientation of the motion-defined boundary responded about 40 ms more slowly, on average, to the kinetic edge stimulus than to a luminance edge. In nonselective cells, that is, those presumably responding only to the local motion in the stimulus, this difference was only about 20 ms. Response latencies for the luminance edge were indistinguishable in KE-selective and -nonselective neurons. We infer that while responses to luminance edges or local motion are indigenous to V2, KE-selective responses may involve feedback entering the ventral stream at a point downstream with respect to V2.

scholarly journals Border Ownership from Intracortical Interactions in Visual Area V2

Neuron ◽  
2005 ◽  
Vol 47 (1) ◽  
pp. 143-153 ◽  
Author(s):  
Li Zhaoping
Keyword(s):  
Visual Area ◽  
Area V2

Temporal Dynamics of Shape Analysis in Macaque Visual Area V2

2004 ◽  
Vol 92 (5) ◽  
pp. 3030-3042 ◽  
Author(s):  
Jay Hegdé ◽  
David C. Van Essen
Keyword(s):  
Cortical Neurons ◽  
Time Course ◽  
Temporal Dynamics ◽  
Visual Stimulation ◽  
Signal To Noise Ratio ◽  
Stimulus Onset ◽  
Visual Area ◽  
Response Modulation ◽  
Population Response ◽  
Area V2

The firing rate of visual cortical neurons typically changes substantially during a sustained visual stimulus. To assess whether, and to what extent, the information about shape conveyed by neurons in visual area V2 changes over the course of the response, we recorded the responses of V2 neurons in awake, fixating monkeys while presenting a diverse set of static shape stimuli within the classical receptive field. We analyzed the time course of various measures of responsiveness and stimulus-related response modulation at the level of individual cells and of the population. For a majority of V2 cells, the response modulation was maximal during the initial transient response (40–80 ms after stimulus onset). During the same period, the population response was relatively correlated, in that V2 cells tended to respond similarly to specific subsets of stimuli. Over the ensuing 80–100 ms, the signal-to-noise ratio of individual cells generally declined, but to a lesser degree than the evoked-response rate during the corresponding time bins, and the response profiles became decorrelated for many individual cells. Concomitantly, the population response became substantially decorrelated. Our results indicate that the information about stimulus shape evolves dynamically and relatively rapidly in V2 during static visual stimulation in ways that may contribute to form discrimination.

scholarly journals Neuronal Responses in Visual Area V2 (V2) of Macaque Monkeys with Strabismic Amblyopia

2011 ◽  
Vol 21 (9) ◽  
pp. 2033-2045 ◽  
Author(s):  
H. Bi ◽  
B. Zhang ◽  
X. Tao ◽  
R. S. Harwerth ◽  
E. L. Smith ◽  
...  
Keyword(s):  
Visual Area ◽  
Neuronal Responses ◽  
Strabismic Amblyopia ◽  
Macaque Monkeys ◽  
Area V2
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